Dual-Sense Circular Polarization Antenna Based on Reconfigurable Orthogonal Network

Abstract

A novel circular polarization (CP) reconfigurable microstrip antenna is presented. The CP reconfigurable antenna is divided into three layers, composed of an annular radiating patch, ring slot, and reconfigurable orthogonal network (RON). The designed antenna is fed by dual vertical branches at the output port of the RON. By adjusting the bias voltage of the PIN switch loaded on the reconfigurable orthogonal network, the output phase can be changed, which means that the polarization direction of CP antenna is switchable. Simulation results show that the proposed feeding network provides constant phase difference and lower insertion loss for both states in the operating frequency band, thereby achieving good match and axial ratio characteristics either LHCP or RHCP state. Measured results show that the proposed antenna exhibits operational bandwidth of 1.2% with axial ratio below 3 dB and return loss above 10 dB in both polarized states. Good agreement between simulated and measured results is obtained.

Design a dual circular polarized array antenna with fan‐beam radiation pattern

“…15 The quadrature hybrid couplers can be used as the feed network for CP microstrip antennas. [16][17][18] In Reference 19, a multi-bit RFID tag is presented. The tag consists of a wideband dual polarization antenna.…”

“…The inserted same input current with a 90 degrees phase difference in two arms of crossed dipole leads to a circular polarization radiation pattern 15 . The quadrature hybrid couplers can be used as the feed network for CP microstrip antennas 16–18 . In Reference 19, a multi‐bit RFID tag is presented.…”

A Low-profile and Low-cost Dual Circularly Polarized Patch Antenna

“…With the rapid development of modern communication systems, the demand for compact and low-cost dual circularly polarized (CP) antennas has attracted immense attention due to their capabilities of increasing the capacity of wireless communication, reducing multipath interference, and requiring no strict orientation between receiving and transmitting antennas [1][2][3][4][5]. One of the alternative approaches to produce circular polarization is to create two orthogonal resonant modes on the radiating element with a 90 • phase difference.…”